(:*******************************************************:)
(: Test: K2-DocumentURIFunc-7                            :)
(: Written by: Frans Englich                             :)
(: Date: 2007-11-22T11:31:21+01:00                       :)
(: Purpose: Invoke on a single attribute node.           :)
(:*******************************************************:)
empty(document-uri(<elem attr="f"/>/@attr))